v5.0.0

chore: release v5.0.0 (#592)

Release **v5.0.0**.

Bumps the workspace version `4.5.0` → `5.0.0` and closes out the
`[Unreleased]`
CHANGELOG section as `[5.0.0] - 2026-09-14`. Major bump: this release
carries
breaking API changes across every language binding.

Base includes everything on `main` through #581 (the
`comparison_symbols`
switch, verified live against production) and #591 (`history_executions`
paging).

### Breaking changes (7)

- Removed `GridContext.submit_strategy_questionnaire` (`POST
/v1/record/questionnaire`) and `SubmitStrategyQuestionnaireOptions`
across all bindings.
- `WarrantStatus` gains an `Unknown` variant (first variant) — shifts
the ordinal of existing variants in C/C++/Java/Node.js/Python.
- `WarrantInfo.expiry_date` is now optional (empty server dates no
longer fail the whole `warrant_list`).
- `FundamentalContext.industry_rank` takes typed `IndustryRankIndicator`
/ `IndustryRankSortType` (+ `Market`) instead of three free-form
strings.
- `FundamentalContext.us_financial_statement` takes a typed
`FinancialStatementKind` instead of a free-form `kind` string.
- Write methods on `AlertContext` (`add`/`update`/`delete`) and
`SharelistContext`
(`delete`/`add_securities`/`remove_securities`/`sort_securities`) now
return `()` / `void` / `Promise<void>`.
- `FundamentalContext.ratings` (`GET /v1/quote/ratings`) is temporarily
unavailable (server-side 暂不开放) — commented out across all bindings;
`StockRatings` types retained.

Added (7), Changed (14), and Fixed (12) are detailed in `CHANGELOG.md`.

### Changelog housekeeping

Consolidated the interleaved duplicate `[Unreleased]` section headers
(`Breaking changes` ×2, `Fixed` ×3) into one section each, ordered
Breaking → Added → Changed → Fixed, and removed 4 duplicate Fixed
entries
(the C/C++ null-pointer, C++ `AssetContext`, and C `lb_statement_item_t`
items
each appeared twice). No entry content was dropped other than the
duplicates.
Added one new entry for #581 under Changed.

### To publish after merge

1. Fast-forward the `release` branch to the merge commit: `git push
origin <merge-sha>:release` (triggers the Release workflow → crates.io /
PyPI / npm / Maven Central / S3).